Triangles Challenge

What type of triangle has all sides of equal length?

• Right-angled triangle

• Scalene triangle

• Isosceles triangle

• Equilateral triangle

Calculate the perimeter of a triangle with side lengths 5, 7, and 9.

• 15

• 30

• 12

• 21

Find the area of a triangle with base 6 and height 8.

• 24

• 30

• 10

• 14

What are the properties of a right triangle?

• Two 90-degree angles and equal sides

• One 90-degree angle and satisfies the Pythagorean theorem

• No 90-degree angles and equal sides

• One 90-degree angle and equal sides

Apply the Pythagorean theorem to find the length of the hypotenuse in a right triangle with legs of length 3 and 4.

• 10

• 7

• 2

• 5

Identify the type of triangle with side lengths 3, 4, and 5.

• Isosceles triangle

• Scalene triangle

• Equilateral triangle

• Right-angled triangle

If a triangle has angles of 30°, 60°, and 90°, what type of triangle is it?

• Acute-angled triangle

• Equilateral triangle

• Right-angled triangle

• Isosceles triangle

What is the sum of the interior angles of a triangle?

• 180

• 360

• 270

• 90

Calculate the perimeter of a right triangle with legs of length 6 and 8.

• 20

• 14

• 10

• 18

Find the area of a right triangle with base 10 and height 12.

• 22

• 60

• 100

• 8